Folding chair



FIG. 1 is a top side front perspective view of a folding chair showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being substantially identical;

FIG. 3 is a front elevational view thereof, the rear elevational view being substantially identical;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a folding chair, as shown and described. 